Lock for sliding doors.



E. BKRSONY.

LOCK FOR SLIDING DOORS.

APPLICATION HLED FEB. 18. I915.

Patented Oct. 12, 1915.

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E. BA'RSONY.

. LOCK FOR SLIDING DOORS.

APPLICATION FILED FEB. 18. 1915.

1,156,841; Patented 00t.12,1915.

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LOCK ron snrnnve noons.

Specification of Letters Patent.

Patented Oct. '12, 1915.

Application filed February 18, 1915. Serial No. 9,097.

To all wiwm it may concern Be it known that I, EMnRY BARsoNY, a citizen of the United States, residing at Castleton-on-Hudson, in the county of Rensselaer and State of New York, have invented certain new and useful Improvements in Looks for Sliding Doors, of which the following is a specification.

This invention relates to certain new and useful improvements in looks for sliding doors. 7

The primary object of this invention is tr provide a lockwhich is especially adapted for sliding doors such as elevator doors and is arranged to automatically secure the door by means of both a latch and a bolt whenever the door is closed.

A further object is to provide a lock for sliding doors which may be readily attached thereto and is provided with a latch and a bolt, both of which are normally in their locked position and are releasable by means of a key from only one side of the door.

A still further object of the invention is to provide a pivoted latch and a sliding bolt within a lock casing adapted to be countersunk in the corner portion of a slidingdoor, the bolt being retained inoperative by engaging the door casing excepting when the door is completely closed and at which time both the latch and bolt are automatically shifted to their locking positions.

l/Vith these general objects in view and others that will appear as the nature of the invention is better understood, the same consists in the novel combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawings, and pointed out in the appended claims.

-In the drawings forming a part of this application and in which like designating characters refer to corresponding parts throughout the several views, Figure 1 is a side elevation of a lower portlon of an elevator car showing the door thereof provlded with the present device in its locked posi-- tion and with the front plate of the lock casing removed. Fig. 2 is a similar view with the door in its open unlocked position. Fig. 3 is a horizontal transverse sectional view through the lock and the adjacent portion of the door upon line IIIIII of Fig. 2, and Fig. A is a perspective view of the lock removed and with the front plate of the casing removed therefrom.

Referring more in detail to the drawings, it will be noted'that the present lock is designed for any form of sliding door, and is herein illustrated in connection with the elevator car 10, and its door 11 which is slidably positioned within the groove or way 12 at the bottom of the car.

A casing 13 is provided for inclosing the operating mechanism of the lock and such casing is adapted to be countersunk in the cut-away corner portion 14 0f the door and is secured in position by means of screws 15, while the casing is provided with a removable cover plate 16 which is secured in place by means of screws 17 entering the transverse posts 18 of the casing. A latch 19 is pivoted as at 20 within the casing and is provided with a hook 21- upon its free end which projects through the side slot 22 of the casing and is adapted to engage within the keeper recess 23 of the door casing or side'of the car 24. A double bow-shaped leaf spring 25 is secured. within the casing and is in contact with the latch 19 being adapted to normally resiliently position the latch in its locked position. A vertically arranged sliding bolt 26 is mounted within the casing and extends through spaced straps 27, and the said bolt is provided with an upper angular extension 28 adapted to engage the latch 19 and elevate the same to its inoperative position whenever the bolt is inoperatively positioned retracted. An arm 29 is also carried bythe bolt 26 at the top thereof and to which a spring 30 is attached for normally projecting the said bolt. A toothed surface 31 is provided at one side of the bolt with which a pinion 32 is in constant mesh, the said pinion being j ournaled transversely of the lock casing and having itsspindle 33 provided with a squared bore 34 for the reception of an operating key 35. The groove 12 is provided with a keeper socket 36 in the bottom thereof and'into which the lower beveled end 37 of the bolt is'adapted to project whenthe door is in its closed position.

From this detailed description of the device, it will be seen that when the door is open as illustrated in Fig. 2, the bolt 26 will be retained retracted by reason of the engagement of its end 37 with the bottom of the guide groove 12 and this retracted position of the bolt retains the bolt extension 28 against the latch 19 with the spring 25 under compression and with the latch in its an locked position. Upon closing the door, the v spring automatically projects the bolt as soon as the operative end 37 thereof registers with the guide groove keeper socket 36 and whereupon the spring 25 lowers the latch with its hooked end 21 engaging within the keeper socket 23. The key is adapted to be inserted through the keyhole 38 of the cover plate 16 of the casing, and the shank 39 of the key entering the socket 34, the pinion 82 may be revolved and the bolt 26 thereby elevated or retracted which also results in retracting the latch 19 and thereby completely releasing the lock.

VVhile the form of the invention herein shown anddescribed is what is believed to be the preferred embodiment thereof, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

What I claim as new is 1. A device of the class described, comprising in combination with a car, having a slidable door, the sides of said car provided with a bottom socket and a side slot, a shiftable bolt upon said door adapted for seating within said socket, a spring-pressed latch upon said door engaging said bolt and adapted for engagement with said slot.

2. A device of the class described, comprising in combination with an elevator car having a slidable door, the sides of said car provided with a bottom socket and a side slot, a sliding bolt upon said door, resilient normally projecting means for said bolt, an upper arm on said bolt, a latch engaging said arm and adapted for projecting within said slot, and a resilient member adapted for lowering said latch.

3. A lock comprising a casing, a spring pressed hooked latch pivoted within said casing and projecting therefrom, a slidable bolt mounted within said casing and having an extension at one end positioned within the path of movement of the said latch and having its other end beveled and normally positioned outwardly of the casing, manual retracting means for the said bolt, automatic projecting means for the said bolt and resilient shifting means for the said latch.

42. In combination with a slidable door having a cut-away corner portion and a keeper side notch and bottom socket in the door casing, a lock casing secured within said cut-away portion, a springrpressed latch having one end pivoted within the lock casing and its other end hooked andextending outwardly thereof in vertical alinement with the said notch, a shittable bolt vertically positioned within the said casing and having its lower end beveled and normally projecting outwardly of the casing in the same vertical plane as the said socket, an angular extension upon the upper end of the said bolt in engagement with the said latch when the bolt is retracted, automatic projecting means for the said bolt, said bolt provided with the toothed side portion, a pinion in constant mesh with the said toothed portion and having a spindle provided with a key-receiving rectangular bore.

In testimony whereof I afli-X my signature in presence of two witnesses.

EMERY BARSONY.

1 Vifitnesses FRAnK H. MOKNIGHT, J. W. MGKNIGHT.

Copies of this patent may he obtained for five cents each. by addressing the Commissioner of Patents Washington, D. C. 

